MESON Chess Problem Database

Problem Display
PID: 90258 (8/6k1/4KN2/4Q1N1/8/8/8/8 w - - 0 1)

Lorber, Emanuel

Die Schwalbe, 1925

8/6k1/4KN2/4Q1N1/8/8/8/8

#2

4 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf7?
      • 1...Kg6
        • 2.Qg3#
        • 2.Qg5#
      • 1...Kf8!
    • 1.Sgh7?
      • 1...Kg6
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...Kh8!
    • 1.Qh2?
      • 1...Kf8
        • 2.Qh6#
        • 2.Qh8#
      • 1...Kg6!
  • Keys
    • 1.Qg3!
      • 1...Kg6
        • 2.Sf7#
      • 1...Kh6
        • 2.Sf7#
      • 1...Kf8
        • 2.Sgh7#
      • 1...Kh8
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR(A)+S(B)
      • K(a);S_FLIGHT::S(B)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).